36 



with the cultivation. Trees will respond to good cultivation 

 the same as corn or garden crops and this point should not be 

 overlooked. 



Protection Against Live Stock: It is practically impossible 

 to secure a good shelterbelt or woodlot unless all livestock are 

 shut out from the planted area, at least until the trees are 

 large enough to prevent serious breakage. Even then the trees 

 may be injured, not only by the rubbing of the animals, but 

 by their tramping and packing the soil about the roots. In a 

 windbreak or shelterbelt it is generally desirable to have good 

 protection against the wind close to the ground. Livestock 

 invariably damage the lower branches of the trees and thus 

 make them less effective for shelter. Pasturing a newly 

 planted evergreen shelterbelt should not be practiced under 

 any conditions. 



VARIETIES FOR IOWA PLANTING 

 WHITE PINE (Pinus Strobus) 



The Tree: The white pine is not only one of the most 

 beautiful of the pines but is also one of the fastest growers. It 

 is native to the northeastern part of the country, the Lake 

 States, and extends as far Avest as Hardin county, Iowa. For 

 planting its range has been very much extended. It will thrive 

 on well-drained soil of almost any quality, but best on a light, 



Fig. 5. A ten-year-old shelterbelt of white pine. Some of the trees are 

 12 to 15 feet in height. This is one of the most desirable trees for shelterbelt 

 planting. ! i 



